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Extract resizeParams method.

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orian 2015-10-14 18:15:57 +02:00
parent 5f5df0c860
commit 431898ec9a
2 changed files with 29 additions and 6 deletions
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14
transform.go
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@ -79,13 +79,10 @@ func Transform(img []byte, opt Options) ([]byte, error) {
return buf.Bytes(), nil
}
// transformImage modifies the image m based on the transformations specified
// in opt.
func transformImage(m image.Image, opt Options) image.Image {
func resizeParams(m image.Image, opt *Options) (w, h int) {
// convert percentage width and height values to absolute values
imgW := m.Bounds().Max.X - m.Bounds().Min.X
imgH := m.Bounds().Max.Y - m.Bounds().Min.Y
var w, h int
if 0 < opt.Width && opt.Width < 1 {
w = int(float64(imgW) * opt.Width)
} else if opt.Width < 0 {
@ -110,9 +107,14 @@ func transformImage(m image.Image, opt Options) image.Image {
h = imgH
}
}
return
}
// resize
if w != 0 || h != 0 {
// transformImage modifies the image m based on the transformations specified
// in opt.
func transformImage(m image.Image, opt Options) image.Image {
// resize if needed
if w, h := resizeParams(m, &opt); w != 0 || h != 0 {
if opt.Fit {
m = imaging.Fit(m, w, h, resampleFilter)
} else {